Here's my complete Keybinding list. I'm too brain fried right now to dig through all that for the collapse binding if it's even in there. You may just have to use the arrow keys with a modifier.
DEFAULT KEY BINDINGS
Double Click on a track number will select all tracks. Double clicking again will deselct all tracks.
Enhanced Editing with QWERTY Keyboard on pg 399
Copy Special = Alt + Ctrl + C
Paste Special = Ctrl + Alt + V
Record = Arm desired tracks and press R. Pressing R again stops recording but continues playback.
Select All = Ctrl + A
Open Inspector = I
Open Clips Inspector = Shift + I
Open Track/Bus Inspector = Ctrl + Shift + I
Open Pro Channel Inspector = Ctrl + I
*Press hotkeys again to toggle the Inspector back to Track/Bus strips
Undo = Z
Redo = CTRL + Shift + Z
Open Multi Dock = D
Expand Multi Dock = Shift + D (toggle)
Cycle through Multi Dock tabs = Ctrl + Shift + left/right Arrow Keys
Open Console View = Alt + 2
Insert Marker = M (set Now Time beforehand)
Mute/Unmute selected clip(s) = K
Open/Collapse Take Lanes on selected track(s) = Shift + T
Adjust In Focus Track Height = Ctrl + Shift + up/down Arrow Keys
Enable Looping on audio clips (Groove Clips) = Select clip > Ctrl + L
Audition = Select tracks/clips then Shift + Spacebar (plays only selected clips)
Open Track Manager = H
Bypass all FX in project (including ProChannel) = E
Meter/Key View (Alt + Shift + 6)
Metronome Preferences = Shift + F3
Insert Track = Click on a track and press Shift + 0 It will insert the same type of track you clicked.
Aim Assist enable/disable = X
Deselect Range Selection = Ctrl + Shift + A
Snap enable/disable = N
Toggle between default and alternate Snap resolution = press/hold N
Toggle Snap To/By = Ctrl + Shift + F12
Move to next Transient = Select clip + Tab (pg 362 for details)
Move to Previous Transient = Select clip + Shift +Tab
Enable renaming on selected track = F2 (Groove 3)
Toggle between two most recent Edit Filters = Shift + Right Click
Toggle between Volume and current Edit Filter = = (equal key)
Open Audio Snap Pallette = A
Show/Hide Tracks/Console Strips:
*For the following to work in the Console View you must have "Keep track/console visibility states in sync" selected in the Track Manager otherwise the changes will only take effect in the Track View. Not the Console. These show/hide binding do not work on busses.
Show Track Manager = H
To Hide in focus Track/Strip = Ctrl + H
Show All Tracks/Strips = Shift + H
Show only selected Tracks/Strips = Ctrl + Shift + H
Looping:
Enable Looping = Shift + L
Set Loop Points = Select desired Loop range in the Track View then press Shift + L
Open Controller Pane (PRV) = Alt + C
Now Time:
Rewind to Start = W
Jump to start = Ctrl + HOME (or W)
Jump to end = Ctrl + END
Jump to start of current measure or previous measure = Ctrl + PAGE UP
Jump to Next Measure = Ctrl + Page Down
Set Now Time = G then type in a value
Jump to start of selected clip/range selection = Shift + G
Jump to Previous Marker = Ctrl + Shift + PAGE UP
Jump to Next Marker = Ctrl + Shift + PAGE DOWN
Shift + X = X-Ray (does not work on everything. If you want to X-Ray all windows you must create a binding first)
Toggle "Rewind On Stop" = Ctrl + W
Temporarily invert "Rewind On Stop" setting = Ctrl + Spacebar (on stop)
Audition Clip and/or Range Selection = Shift + Spacebar (will jump and play range selection once and/or only play selected clip)
ZOOM:
Zoom = CTRL + Arrow Keys
Engage Zoom Tool = Z (you can click + drag over a clip section and that section will automatically zoom in)
ALT+Z Undo the current zoom
ALT+SHIFT+Z Redo the previous zoom
F Fit tracks to window
A Show all tracks
SHIFT + F Fit project to window
SHIFT + double-click a clip Maximize track height
F11 Full Screen mode
To enable/disable Auto Zoom = SHIFT + Z
Adjust In Focus Track Height = Ctrl + Shift + up/down Arrow Keys
Ruler Zooming:
Horizontal = Left Click + Drag up/down
Vertical = Right Click + Drag up/down
Scroll Zoom:
Zoom Vertical and Horizontal = Select CLIP + Alt + Scroll (hold Shift for faster zoom)
Zoom Waveform Only (vertical) = Select CLIP + Alt + Ctrl + Scroll
To change these behaviors Select Options in the Track View menu > Zoom Options > select desired behavior pg 330
Key bindings to adjust how tracks are displayed:
Hide all non selected tracks, zoom current selection(s) vertically and fit clips to window horiz. = Ctrl + Alt + H
Hide all non selected tracks, zoom current selection(s) vertically = Ctrl + Shift + H
Hide selected tracks = Ctrl + H
Show all tracks = Shift + H
Fit all tracks to window vertically = F
Fit all tracks vertically and horizontally = Shift + F
Open Track Manager = H
Undo view change = Alt + Z
Redo view change = Alt + Shift + Z